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一、加载视图

- (void)viewDidLoad {

[superviewDidLoad];

NSString *strurl=@"html地址";

UIWebView *web = [[UIWebView alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

web.delegate =self;

[web loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:strurl]]]

[self.view addSubview:web];

}

二、遵守 web 协议方法

//UIWebViewDelegate协议方法

- (void)webViewDidFinishLoad:(UIWebView *)webView {

UIWebView *web = webView;

//获取所有的html

NSString *allHtml =@"document.documentElement.innerHTML";

//获取网页title

NSString *htmlTitle =@"document.title";

//获取网页的一个值

NSString *htmlNum =@"document.getElementById('title').innerText";

//最后调用stringByEvaluatingJavaScriptFromString获取相应内容

//例如如下代码获取Html内容

NSString *allHtmlInfo = [web stringByEvaluatingJavaScriptFromString:allHtml];

谢谢!!!